14Kt Gold Threadless Flower Top with 5 Petal Marquise Prong Set Gem is made of solid 14kt nickel-free Yellow Gold with durable 316LVM ASTM F-138 Implant Grade Steel Pin designed to be practical and easy to use. Fits all sizes of pins and bases in our threadless body jewelry line. Top Size: 6.9mm (L) x 6.7mm (W) x 2mm (THK); Pin Size: 0.45mm x 4.7mm.